Norwegian media say prison authorities have rejected mass killer Anders Behring Breivik's request for a furlough to attend his mother's funeral.

The 34-year-old, far-right fanatic, whose mother died Friday, was convicted of terrorism and premeditated murder in 2012 for killing 77 people and wounding hundreds in a bomb-and-gun rampage that stunned peaceful Norway a year earlier.

His laywer, Tord Jordet, told Norwegian news agency NTB that prison authorities on Tuesday decided to extend Breivik's confinement in the maximum-security wing of Oslo's Ila Prison, and rejected his request to attend the funeral.

Breivik would appeal the ruling, Jordet said.

Breivik is serving a 21-year sentence that can be extended for as long as he's considered a menace to society.